Method of manufacturing fixture stems



June 22 1926. 1,589,942

G. M. CONDIT METHOD OF MANUFACTURING FIXTURE STEMS Filed Oct. 17, 1925 H13 ATTORNEYS Patented June 22, 1926.

Uttlllhil PATENT @FFMZE.

GEORGE M. CONIBIT, G1 TVitT'ERVILLE, CCNNEC'IICUT, ASSIGNOE TO THE AMERICAN PIN COMPANY, DIVXSFLOII SCOVILLE MANUFACTURING COMPANY, OF WATERBU'BJY,

CONNECTICUT, A COEPCRATION OF CONNECTICUT.

hiE'II-IOD O TEANTIFAGTURING FIXTURE S'IETES.

Application filed October 17, 1925.

This invention relates to a method of manufacturing fixture stems, and more particularly to the fixture supporting end of the stem. The stem to which the invention relates is the well known part of a lighting fixture commonly connected to a junc ion box or other support and which in use is associated with a canopy through which the fixture stem extends and is adapted to sup- 10 port a lighting fixture in any of the custoinary manners. Herctofore so far as I am aware, this type of fixture stem at the lighting fixture end thereof has been provided with a connecting member to which the lighting fixture is suitably attached. This connecting end has been ailixcd to the lighting fixture stein in various manners and diiliculty has been experienced in the use of the stem by the parts becoming loose or di connected. The object of my invention is to overcome this difficulty and to provide a fixture stein so formed at the fixture support end thereof that there is an eye or loop made integral with the body of the tube forming the stem, whereby an article more attractive in appearance is provided as well as one in which there is no possibility for the parts to become loose or separated, and to therefore, support the fixture in an insecure manner or permit the fixture to fall.

In carrying out the invention the fixture stem is made from a tube which is preferably re-drawn to provide an end section which is relatively heavier than the body of the tube. The reinforced end section is then formed as hereinafter described into a loop which is integral with the tube and provides an eye from which a lighting fixture may be supported in any desired manner. The lighting fixture stem at its opposite end. is

connected to a junction box or other support in the usual manner and the construction of this end of the fixture stem will be hereinafter described, but forms no part of my invention.

In the drawing, Figure 1 is an elevation of the end of a tube from which my improved lighting fixture stem is formed.

Fig. 2 is an end elevation of the same.

Fig. 3 is an elevation of the end of the fixture stem after the same has been drawn er pun to form a knob therein,

Fig. 4.- is an elevation of the drical body portion of the tube.

Serial No. 63,172.

5 is an elevation showing the end of the fixture stein after the drawn or spun portion has been flattened.

Fig. 6 is an end elevation of the same.

Fig. 7 is an elevation of the end of the fixture stein after apertures have been reamed in the flattened end thereof.

Fig. 8 is an end elevation of the same.

Fig. 9 is a side elevation of the fixture stem after the flattened end thereof has had the outer parts rounded to form a loop therein.

Fig. 10 is an end elevation of the same.

Fig. 11 is an end elevation of the fixture stem after a bead has been spun at the end of the body of the tube.

Fig. 12 is an end elevation of the same.

Fig. 13 is an elevation and partial section of the complete fixture stem, and

Fig. 1a is an elevation and partial section showing another form of the end of the stem for connection with a junction box or other support.

Referring to the drawing it will be seen that in carrying out my invention, the fixture stem made in accordance therewith is constructed from a tube 20 of brass or other similar material. The tube is preferably re-drawn as indicated in Figures 1. and 2, so that the closed end 21 of the tube is of relatively greater thickness than the cylin- After thus re-drawing the tube blank, the reinforced end thereof is suitably drawn or spun to form a spherical knob 22 therein. Those portions lying between the end of the knob and the body of the tube being inclined or tapered as clearly indicated in Figures 3 and 4c of the drawing. The d fawn or spun end of the tube, that is the spherical end thereof is flattened. as indicated at 23 in Figures 5 and 6 of the drawing. This flat tened portion at the end of the tube is then which the lead wires may be carried from the stem to the lighting fixture. As illustrated in Figures 11 and 12, the end portion of the body of the stem is then suitably spun to form a bead 29 therein. As will now be appreciated this forms an end to the lighting fixture stein which is integral therewith and provides an eye for the connection of the lighting fixture, and furthermore, is of an ornamental appearance.

The stem as hereinbefore described may be provided at its opposite end with a socket connection 30 as indicated in Figure 13 or stud connection 31 as indicated in Figure i l for securing the same to a junction box or other support. in either event, the stud or socket connection is preterabl inade oil. steel and with a circumferential groove 32 into which the edge portion of the cylindrical body of the stem is suitably pressed to securely connect these parts one to the other. However, as horeinbc'rore stated, the construction at this end oi? the stern forms no part of my present invention. It will also be obvious as indicated in Figure 14L, the stem in a suitable position is provided with a hole or opening 3-1 through which the lead wires are threaiiled so as to pass from one end of the l \ture stem to the other end interiorly thereof.

1 claim as my lHYQDtlOIIZ 1. The herein described method of inaking a l'lXtUl'G stein froin a tube blank which consists in drawing the tube blank to pro vide e reinforced section therein, then spinning the tube blank to form a knob in the reinforced sect-ion thereof, and thou :l'orniing a loop in the said knob.

2. The herein described method of male ing a fixture stem from a tube blank which consists in lirst drawing the tube blank to provide a thicker section at the end thereof, then spinning the thick end oi the tube to form a knob, then flattening the knob, and then reaming the flattened knob to torn a loop thereof.

3. The herein described method of inaliing a fixture stein 'lroni a tube blain; which consists in lirst drawing the tube blank to provide a thicker section at the end thereof, then spin the thick end of the tube to :forni a knel, then flattening the knob, then formingopenings in the flattened sides ot the knob, and then rolling the outer portions of the flattened knob to form a loop thereof.

The herein described method of inaliinn; a l'ixtnre stem from a tube blank Y hich consists in. first drawing the tube blank to provide a thiclic section at the end thereof, then spinn' 1;; the thick end of the tube to form a lino-J, then :tladteningthe knob, then forming o irening s in the flattened sides of the knob, then rolling the outer portions of the flattened knob to term a loop thereof, and then spinning the end portion oi? he tube to l'orin bead thereon.

Signet by me this 2nd day of? 1925.

October,

GEORGE) M. CONDIT. 

